A student's research shows that there were more car accidents in 2015 than there were in 1915. He concludes that people were better drivers in 1915 than in 2015.
What would be a more appropriate or valid measure for this comparison?

Question

Quizplus · Accepted Answer

Comparing the accident rates (percentages) for 1915 and 2015 would be a more appropriate measure for this comparison because the population and number of cars on the road have drastically increased over the years, making direct comparisons between the raw numbers of accidents less reliable. Using accident rates would allow for a more accurate comparison of driving safety between the two time periods.

A Student's Research Shows That There Were More Car Accidents